Electric chain saw



FIG. 1 is a top, left and front side perspective view of an electric chain saw, showing my new design;

FIG. 2 is a bottom, right and hack side perspective view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a back elevational view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

CLAIM The ornamental design for an electric chain saw, as shown and described. 